I main a Horde character. I laughed at it. Your mileage may vary.
With that said, I think Jaina does get shown off as more amazing than Thrall and Baine, both in the intro sequence and even later. When we find Jaina it’s by following the trail of … well they’re not really corpses, but I guess she’s farming stygia … in the Maw. When we find Thrall, he’s wounded, then throws his axe, and can’t seem to use the elements. When we find Baine, he gets stabbed, discarded off a cliff, and is dying. Anduin is in chains being overseen by Sylvanas, but once we free him he gets to have his heroic moment letting us escape.
When we rescue them and bring them to Oribos we end up with Thrall and Baine sitting like two homeless guys on the steps (which brings up the question of where folks sleep in Oribus), but Jaina is up near Bolvar at the command table (or whatever it is).
This type of disagreement comes along with having Horde players quest with Alliance NPCs (and vice versa). It would’ve been pretty dull to just have them all in four cages located right next to each other. But any other way leads to this. I can just imagine people saying “Well Jaina’s cage is more heavily defended, so she’s clearly more powerful since she required that much” or “Well Thrall’s cage is further in the questline so he’s held deeper in the Maw making him more important.”
I still laughed at Thrall trying to beat people with a crossbow. But in case Blizzard is listening, I laughed the first time. Stop making me replay that whole thing on any character I want to bring to Shadowlands.